Malicious PDF — malware analysis report

Static analysis result for SHA-256 23684e9ac46cce95…

MALICIOUS

PDF

67.9 KB Created: 2020-09-23 18:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bd5a583c71392156d2b4c322301a504 SHA-1: 6b1585800600a6844a9f5766712dcab87d976aa3 SHA-256: 23684e9ac46cce95e832a30331d0b8b1cd423397cac9139725d7121fb62c8d3f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.link/wix?keyword=pioneer+sc+85+manual`. This indicates the document's primary purpose is to redirect users to a potentially harmful site. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, some of which are also flagged as unknown or potentially malicious. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/wix?keyword=pioneer+sc+85+manual
    • http://lumev.vidatacos.com/uploads/1/3/0/7/130739509/7103479.pdf
    • http://files.maryelizabethbyrne.com/uploads/1/3/1/8/131872178/3cffd44ad4.pdf
    • http://dozunajek.kira-marie-mccullough.com/uploads/1/3/1/4/131453558/kilabo.pdf
    • https://69b553a2-5a74-4152-a30b-04aa2cdc14b9.filesusr.com/ugd/f68081_92a0bbbe1b3d4687816c3ca1cf4c948e.pdf?index=true
    • https://ce1e5a71-2e03-4d22-9dbe-4bea6b670e9c.filesusr.com/ugd/73c254_161376c681ba49b8b472bd8589142389.pdf?index=true
    • https://e8ab8acf-6499-408e-9077-ae7c3f90e306.filesusr.com/ugd/d17951_3c0ac790f04c466e937d3c4b00c49c50.pdf?index=true
    • https://2fb43d3b-a5a2-49ba-9c56-76ce5702c761.filesusr.com/ugd/7d2910_c81b495759214b3199c6178f4f5a8f50.pdf?index=true
    • https://8e4449e9-ccfd-4a21-a9c2-d2edc3a1ed66.filesusr.com/ugd/9d66c7_670282ae8c504d198a2756e56184a4e1.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0482/5379/6506/files/a_voyage_to_lilliput_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12410546401.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9675/files/vortex_fallout_4_vr.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0811/files/jogebo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c687.bin
4f4c7a0a7438c0d1bf56a9be04df7b2c42c6a0654a02e139aedf904169b564d3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC687 5264 bytes
font_01_sfnt_off0000d85b.bin
327996614b418224144c15cb27108830b528380c6712d5a2f831252c8a334335
pdf-font-stream PDF embedded font (sfnt) at offset 0xD85B 13464 bytes